A kinematic theory of rapid human movements: Part III. Kinetic outcomes

Abstract

This paper describes the kinematic and kinetic properties of simple rapid movements using a single and unique framework based on a delta-lognormal law (Plamondon 1993a,b, 1995a,b). Predictions concerning isotonic measurements are made using the properties of acceleration profiles, as described by the first time derivative of the delta-lognormal law. Predictions dealing with isometric measurements are directly analyzed using the delta-lognormal law, after demonstrating the experimental equivalence between isometric forces and virtual velocity profiles. The theory is also used to make statistical predictions about the variability of numerous kinematic and kinetic variables. The overall approach can be viewed as if, at some level of representation, the central nervous system were planning, executing and evaluating simple rapid movements in terms of momentum and energy instead of forces. The unifying perspective provided by the theory constitutes a powerful tool with which to study and analyze movements under numerous experimental conditions, using a single analytical law.

A model for predicting pathologist's velocity profiles when navigating virtual slides

“…The approach herein proposed takes into account the very basic influence of motor movements through a neuromuscular inspired model, coupled to a Bayesian learning strategy which attempts to capture the navigation pattern of a pathologist. The presented method approaches both processes through a hierarchical strategy, articulated in three phases: firstly a biologically inspired model (Plamondon, 1998) emulates nonlinear and linear velocity changes of actual microscopic navigations so that this model resulted suitable for tracking low and rapid velocity patterns. Second, a Bayesian learning strategy generates a navigation probability density function (pdf) from the actual pathologist navigation samples.…”

Control Theoretic Models of Pointing

“…Although noise per se is not modelled, its consequences are. Critiques of the Meyer model have pointed out trouble capturing the case where sub-movements have different speed-accuracy trade-off properties [39,40]. It cannot explain why targets with small and large ID values do not conform to the model.…”

“…Plamondon's Kinematic Theory (KT) assumes that the motor system produces movement by controlling muscles acting in groups, or synergies [39,40]. KT assumes two systems: agonist and antagonist.…”

Automatic Signature Verification: The State of the Art

“…Therefore, although complex theories have been proposed to model the psychophysical mechanisms underlying handwriting [253]- [256] and the ink-depository processes [62], [99], [100], [101], signature verification still remains an open challenge since a signature is judged to be genuine or a forgery only on the basis of a few reference specimens [250]. Fig.…”